Hygiene - Ubisi Mail Magazine

Concentration: The right amount of soap, acid and sanitiser must be used for the amount of
water. Do not waste money by trying to save on the wrong things.
Time: Every milk machine must be washed for a different length of time. The time must not
be shorter than 6 minutes and not longer than 10 minutes. The temperature of the water for
washing will determine the time for washing. The temperature of the water for washing must
never be lower than body temperature. The milk tank is washed with a cleaning agent that
foams to determine the time. The time that the foam takes to run down the sides of the tank,
gives the soap the chance to work.
Action: Action is achieved in the milk tank by using a tank brush. Action is achieved in the
milk machine by letting in air at the suction pipe at the washbasin. The suction pipe must let
in air for 3 seconds before the milk pump lets the water for washing run out in the washbasin.
Longer than 3 seconds will cool down the water for washing too quickly.
Washing programme for the milk machine
Step 1 Rinse the milk machine with cold water. Lukewarm water is very dangerous as lukewarm
does not feel the same for everyone. Water that is too hot will result
in protein forming a layer in the equipment.
Step 2 Wash the milk machine with warm (±75ºC) water and soap for
between 6 and 10 minutes.
Step 3 Rinse the milk machine with sanitiser in cold water ±3
minutes.
Step 4 Drain all water for washing from the equipment.
Acid step Depending on the hardness (amount of lime) of the water,
the milk machine must be washed with an acid once or twice a
week. It can be cold water for 10 minutes. The acid step is done after
Step 2 and before Step 3.
Washing programme for the milk tank
Step 1 Rinse the last milk out of the tank with cold running water (use a hose-pipe).
Step 2 Mix a solution of ±15 litres warm water (75ºC) and foaming soap in a
plastic bucket. Place the bucket in the tank and wash the milk tank with a
brush from top to bottom. Use a bucket because it helps to maintain
the temperature of the water. Do not forget to wash the tank outlet
and gauge/yardstick.
Step 3 Sanitise the milk tank by applying the sanitiser with a spray
bottle or by washing the tank with a tank brush.
Step 4 Drain the sanitising water.
Acid step The milk tank must be washed with a strong acid once a week
to remove lime scale. This step is done after Step 2 and before Step 3.
IMPORTANT: Never rinse
the milk machine again
with clean water after it
was sanitised.
IMPORTANT: Never the
rinse the milk tank with
clean water after it was
sanitised.
UBISI MAIL | APRIL 2005 21